Question

33.3 乘以 66.6 如何简算?

小学四年级的题
经过大家启发,我相处了最符合小学四年级的答案:
33.3 X 66.6 = 33.3 X 3 X 22.2 = 99.9 X 22.2 = (100-0.1) X 22.2 = 2220 - 2.22 = 2217.78
步步口算能完成!
不管怎样谢谢大家!

Answer 1

答案及过程：
33.3×66.6=0.3×111×0.6×111=0.3×0.6×111×111=0.18×12321=2217.78

Answer 2

33.3x66.6=(30+3+0.3)x66.6=30x66.6+3x66.6+03.x66.6=1998+199.8+19.98=2217.78

Answer 3

33.3×66.6=3×6×11.1×11.1=2×9×11.1×11.1=99.9×11.1×2
=11.1×(100-0.1)×2=2×(1110-1.11)=1108.89×2=2217.78

每步都可以心算出来。。。